Thankfully, it was in a heavy traffic area, so when I hit her it was at extremely low speeds.

That happened this morning on my way to work. Can't say I'm thrilled with the experience, but it could have been MUCH worse. Due to the low speeds, the only visible damage was on her bumper, and it looked very much like it would "wax out" as she said. I gave her my name address and phone number, and she said that if it waxes out I'll never hear from her. All in all she was very nice about the whole thing.